Seborrheic dermatitis head recurrence after one year suggests continuing treatment. Including local medication and oral medication, in addition to strengthening care to avoid recurrence. 1. Local medication: you can use selenium disulfide lotion, ketoconazole lotion and so on to wash your hair. Topical glucocorticoid drugs, such as Hasinide solution. 2. Oral medication: If the itching is serious, you can take antihistamine drugs, such as cetirizine and loratadine, and if there is a combination of fungal infection, you should take itraconazole and terbinafine orally. 3. Enhance the care: pay attention to keep the skin area clean and hygienic, avoid spicy and stimulating food, ensure sufficient sleep. Seborrheic dermatitis head recurrence after a year need to actively seek medical attention, under the guidance of the doctor to use medication, not blindly self-medication, in order to avoid adverse effects.